Comfortable and cost- effective, the Dynatron ion is designed to provide uniform distribution of electrical current for safe and easy drug delivery. The return electrode features a patented buffered gel designed specifically for Iontophoresis. The buffered delivery electrode maintains pH up to 80 mA-min. Available in 4 sizes: small, medium, large, and butterfly. Individually packaged treatment packs (12 packs/box). Each treatment package contains: (1) Delivery electrode, (1) Return electrode and (2) alcohol wipes.